%0 Journal Article
%A R. Krastev
%T Approximate Values of the Integral Logarithm and the Exponential Integral Function
%J Mathematica balkanica
%D 2000
%P 141
%V 14
%N 1-2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MABA_2000_14_1-2_a11/
%F MABA_2000_14_1-2_a11